from urllib.request import Request,urlopen
import ssl

url = 'https://www.12306.cn/index/'

headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36"
}
req = Request(url,headers = headers)
#忽略证书错误

context = ssl._create_unverified_context()
resp = urlopen(req, context = context)
print(resp.read().decode('utf-8'))

